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- W2088319027 abstract "We describe an extension of the active homodyne technique to produce stabilised, (pi) /2 radian phase steps in a full-field interferometer. We have implemented the technique in a single mode fibre optic fringe- projector for shape measurement. The interference intensity (and hence phase) is maintained constant by feedback control to a phase modulator in one of the fibre arms. The feedback system has been modified to produce (pi) /2 radian phase steps in the projected fringes. The phase stability and accuracy of each step was measured to be 17 milliradians in a 50 Hz bandwidth. The technique can be used to produce stabilised phase-stepped images in any fibre or bulk optic interferometer where active homodyne feedback control can be implemented." @default.
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- W2088319027 date "2000-08-31" @default.
- W2088319027 modified "2023-09-23" @default.
- W2088319027 title "<title>Shape measurement using a fiber optic fringe projector with active homodyne phase stepping</title>" @default.
- W2088319027 doi "https://doi.org/10.1117/12.397945" @default.
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